"! The nil object is the only instance of Undefined "
Object subclass: Undefined [
<category: 'Library-Core'>
"! Info:

Examples:
"
boot [
mainClass new initExceptions main. 
<halt>  ]

"! Info:
Check if nil, returns true

Examples:
"
isNil [
^ true
]

"! Info:
Check if not nil, returns false

Examples:
"
notNil [
^ false
]

"! Info:
Return the string representation of nil

Examples:
"
printString [
^ 'nil'  ]

]

"! Class methods for Undefined (nil) "
MetaObject subclass: MetaUndefined [
<category: 'Library-Core'>
"! Info:
There is only one nil instance - return nil

Examples:
"
new [
^ nil
]

]

